[ensembl-dev] why the frameshift variants are represented with 'X' as the aminoacid change?

[David Tamborero]

Hi there,

I m realizing that when inputing a frameshift genomic variant, VEP
annotates the corresponding protein change using 'X' as the alt aminoacid
(is not 'X' normally refering to the stop codon?)

e.g. 8_90967511_CT/C  results in NBN p.466 R/X, but I will expect to have
something like R466Gfs*18

thanks!
d
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